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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANAFILL <br /> Units:mg/l,unless noted <br /> Sample Designation MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 <br /> Sampling Date 7/27/06 1/31/07 7/23/07 2/6/08 7/31/08 1/15/09 <br /> Moaltorine and Field Parameters <br /> General Water Ouality Parameters <br /> Temperature(°C)(field) 21.5 16.8 21.2 17.7 21.7 19.3 <br /> Chloride 10 11 9.6 9.58 9.21 9.73 <br /> Nitrate-Nitrogen 3 6 2.9 2.87 2.61 2.92 <br /> Total Dissolved Solids 229 180 200 140 130 220 <br /> Sulfate 6 6.3 6 6.41 6.04 6.51 <br /> PH(std.units)(field) 7.14 7.34 7.22 7.32 7.26 7.68 <br /> Electrical Conductivity(umhos/cm)(field) 341 358 258 378 254.9 270.4 <br /> Turbidity(NTU)(field) 12.7 11.8 11.3 11.3 7.7 7.64 <br /> Calcium 25.6 21 22 16 20 21 <br /> Potassium 13.1 11 3.5 3.3 3.4 3.3 <br /> Magnesium 3.8 5.3 11 8.1 12 12 <br /> Sodium 17.9 18 16 12 15 15 <br /> Volatile Organic Compounds(ugA) <br /> _1,1,1,2-Tetrachloroethane NA NA NA NA <0.38 <0.38 <br /> _1,1,1-Trichloroethane(TCA) NA NA NA NA <0.39 <0.46 <br /> _1,1,2,2-Tetrachloroethane NA NA NA NA <0.35 <0.35 <br /> _1,1,2-Trichloroethane NA NA NA NA <0.44 <0.44 <br /> _1,1,2-Trichlorotriflouroethane NA NA NA NA <0.61 <0.78 <br /> 1,1-Dichloroethane NA NA NA NA <0.37 <0.34 <br /> 1,1-Dichloroethene <0.39 <0.39 <0.39 <0.43 <0.43 <0.29 <br /> _l,l-Dichloropropene NA NA NA NA <0.38 <0.47 <br /> _1,2,3-Trichlorobenzene NA NA NA NA <0.37 <0.37 <br /> _1,2,3-Trichloropropane NA NA NA NA <0.43 <0.43 <br /> 1,2,4-Trichlorobenzene NA NA NA NA <0.36 <0.36 <br /> 1,2,4-Trimethylbenzene <0.23 <0.23 <0.23 <0.29 <0.33 <0.33 <br /> _1,2-Dibromo-3-chloropropane NA NA NA NA <0.69 <0.69 <br /> _1,2-Dibromoethane(EDB) NA NA NA NA <0.39 <0.39 <br /> _1,2-Dichlorobenzene NA NA NA NA <0.38 <0.38 <br /> _1,2-Dichloroethane(EDC) NA NA NA NA <0.38 <0.38 <br /> 1,2-Dichloropropane NA NA NA NA <0.35 <0.35 <br /> 1,3,5-Trimethylbenzene <0.20 <0.20 <0.20 <0.32 <0.39 <0.39 <br /> 1,3-Dichlorobenzene NA NA NA NA <0.37 <0.37 <br /> 1,3-Dichloropropane <O.12 <O.12 <O.12 <0.32 <0.37 <0.37 <br /> 1,4-Dichlorobenzene <O.14 <0.14 <O.14 <0.34 <0.38 <0.38 <br /> 2,2-Dichloropropane NA NA NA NA <0.39 <0.44 <br /> 2-Butanone(MEK) <0.92 <0.92 <0.92 Q.0 <2.0 <1.9 <br /> _2-Chlorotoluene NA NA NA NA <0.33 <0.33 <br /> 2-Hexanone NA NA NA NA <1.8 4.8 <br /> _4-Chlorotoluene NA NA NA NA <0.32 <0.32 <br /> _4-Isopropyltotuene NA NA NA NA <0.39 <0.39 <br /> 4-Methyl-2-pentanone(MIBK) NA NA NA NA <1.9 <1.9 <br /> Acetone <1.8 6* 6.6* <2.7 <3.0 <3.0 <br /> _Acrolem' NA NA NA NA <4.5 <4.5 <br /> Acrylonitrile NA NA NA NA <0.89 <0.84 <br /> Benzene <0.17 <O.17 <O.17 <0.30 <0.33 <0.33 <br /> _Bromobenzene NA NA NA NA <0.38 <0.34 <br /> _Bromochloromethane NA NA NA NA <0.37 <0.32 <br /> _Bromodichloromethane NA NA NA NA <0.30 <0.28 <br /> Bromoform NA NA NA NA <0.31 <0.31 <br /> Bromomethane NA NA NA NA <0.40 <0.33 <br /> Carbon disulfide <0.23 <0.23 <0.23 <0.86 <0.86 <I.0 <br /> Carbon Tetrachloride NA NA NA NA <0.46 <0.46 <br /> Chlorobenzene <O.16 <O.16 <0.16 <0.36 <0.39 <0.39 <br /> Chlor thane < 14..:V.23 <0.23 <0.38 <0.38 <0.31 <br />